Php 由于公钥比私钥长，返回的密钥出现问题

我正在使用openssl_pkey_new生成密钥对。返回的密钥似乎有问题，因为公钥比私钥长。使用私钥签名的数据可以使用公钥进行验证。我只是想确定我在什么地方没有做错什么。多谢各位

下面是我用来生成密钥的代码：

$config = array(
"digest_alg" => "sha512",
"private_key_bits" => 4096,
"private_key_type" => OPENSSL_ALGO_SHA1,
);

$res = openssl_pkey_new($config);
openssl_pkey_export($res, $privKey);
$pubKey = openssl_pkey_get_details($res);
$pubKey = $pubKey["key"];

下面是我用来签名和验证的代码

//sign data
openssl_sign($data, $signature, $privKey, OPENSSL_ALGO_SHA1) or die("ERROR");
$signature = base64_encode($signature); 

//validate signature
$signature = base64_decode($signature);  
$valid = openssl_verify($file, $signature, $pubKey, OPENSSL_ALGO_SHA1);

以下是从我的服务器（Ubuntu 14.04）返回的示例密钥：

---

这些是DSA密钥，具有256位素数

q

和4096位模数

p

。对于DSA密钥，随机密钥

x

的顺序为

q

，公共

y

值的顺序为

p

（y=g^x mod p）。在这种情况下，公钥和私钥都包含所有参数

p

、

q

和生成器

g

。但是当

y

大于

x

时，公钥仍然大于私钥。这是故意的

另一方面，RSA密钥通常有一个小的公共指数

e

，和一个与模数

d

大小相同的私有指数。此外，私钥通常包含执行中国剩余定理计算所需的所有参数（将RSA的速度提高到4倍）。因此，对于RSA，私钥通常比公钥大得多

您可以使用联机ASN.1解码器检查和私钥的值（不要复制以

--

开头的行）。然后，您可以使用OID存储库来查找。如果你不介意的话，我就不去参观了。

相关吗？

-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----

-----BEGIN PUBLIC KEY-----
MIIGSDCCBDoGByqGSM44BAEwggQtAoICAQC15h4XFOpUx1KgHisqrj0hkuykiGoL
qS/qYqXCoBAN7jMO/vLdVpKlmy6jeGGl0aA/SfIgX4EUTMoMcTTEPi7YSbjgJiAt
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-----END PUBLIC KEY-----